<template>
    <div>
      <!-- 面包屑导航区 -->
  <el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
  <el-breadcrumb-item>角色列表</el-breadcrumb-item>
</el-breadcrumb>
<!-- 卡片视图 -->
<el-card>
<el-row>
    <!-- 添加角色按钮区 -->
<el-col>
<el-button type="primary">添加角色</el-button>
</el-col>
</el-row>
<!-- 角色列表区域 -->
<el-table :data="rolelist" border stripe>
    <!-- 展开列 -->
<el-table-column type="expand">
 <template slot-scope="scope">
     <el-row :class= "['bdbottom',i1 === 0?'bdtop':'','vcenter']"  v-for="(item1,i1) in scope.row.children" :key="item1.id">
         <!-- 渲染1级权限 -->
      <el-col :span="5">
          <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
          <i class="el-icon-caret-right"></i>
      </el-col>
      <!-- 渲染2.3级权限 -->
      <el-col :span="19">
       <!-- 通过for玄幻嵌套渲染2级权限 -->
       <el-row :class="[i2 === 0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
          <el-col :span="6">
              <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                  {{item2.authName}}
              </el-tag>
              <i class="el-icon-caret-right"></i>
              </el-col>

          <el-col :span="18">
                 <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                  {{item3.authName}}
              </el-tag>

          </el-col>
       </el-row>

      </el-col>

     </el-row>
   <!-- <pre>
       {{scope.row}}</pre>   -->
   </template>
</el-table-column>
    <!-- 索引列 -->
<el-table-column type="index"></el-table-column>
<el-table-column label="角色名称" prop="roleName"></el-table-column>
<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
<el-table-column label="操作" width="300px" >
    <template slot-scope="scope">
<el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
<el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
<el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
    </template>
</el-table-column>
</el-table>
</el-card>
<!-- //分配权限对话框 -->
<el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <!-- 树形结构 -->
  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id"
  default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
    </div>
</template>
<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定事件
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''

    }
  },
  created () {
    this.getRolesList()
  },

  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否可以删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      // console.log('确认了删除');
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      //    this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限失败')
      }
      // 把获取到的权限数据保存到data中
      this.rightslist = res.data
      //
      // 递归递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defkeys数组中
    getLeafKeys (node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;

}
.vcenter{
    display: flex;
    align-items: center;
}
</style>
